#include <stdio.h>

int main(){
	int num = 0;
	scanf("%d",&num);
	
	int ans[20];
	int *p = ans;
	
	int element = 0;
	while(num < 7){
		p[element] = num % 7;
		num /= 7;
		element++;
	}
	for(int i = element;i >= 0;i--){
		printf("%d",p[i]);
	}
	printf("%d",num);
}